gcc/testsuite/gcc.dg/pr90095-1.c

   1 /* PR middle-end/90095 */
   2 /* { dg-do run } */
   3 /* { dg-options "-Os -fno-tree-bit-ccp" } */
   4
   5 unsigned long long a;
   6 unsigned int b;
   7
   8 int
   9 main ()
  10 {
  11   unsigned int c = 255, d = c |= b;
  12   if (__CHAR_BIT__ != 8 || __SIZEOF_INT__ != 4 || __SIZEOF_LONG_LONG__ != 8)
  13     return 0;
  14   d = __builtin_mul_overflow (-(unsigned long long) d, (unsigned char) - c, &a);
  15   if (d != 0)
  16     __builtin_abort ();
  17   return 0;
  18 }